Composition of stable isotope in precipitation and its influences by different vapor sources in the eastern Qilian Mountains Composition of stable isotope in precipitation and its influences by different vapor sources in the eastern Qilian Mountains

最小化 最大化

Vol15 No.10: 2207-2217

Title】Composition of stable isotope in precipitation and its influences by different vapor sources in the eastern Qilian Mountains

Author】JIA Wen-xiong1*; MA Xing-gang1; XU Xiu-ting1; YUAN Rui-feng1; DING Dan1; ZHU Guo-feng

Addresses】1 College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China; 2 State Key Laboratory of Cryosphere Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China

Corresponding author】JIA Wen-xiong

Citation】Jia WX, Ma XG, Xu XT, et al. (2018) Composition of stable isotope in precipitation and its influences by different vapor sources in the eastern Qilian Mountains. Journal of Mountain Science 15(10). https://doi.org/10.1007/s11629-018-4844-2

DOI】https://doi.org/10.1007/s11629-018-4844-2

Abstract】To better understand the process of precipitation and water cycle, the composition of stable isotope in precipitation and its influences by different vapor sources in the eastern of Qilian Mountains were conducted from June 2013 to May 2014. The total of 100 precipitation samples were collected in Wushaoling national meteorological station located in the eastern of Qilian Mountains. The analysis indicates that the slope of Local Meteoric Water Line is lower than that of Global Meteoric Water Line. The average values of δ18O and δD in precipitation are higher in summer but lower in winter. Except for negative correlation with relative humidity, the stable isotope values in precipitation are positive correlations with temperature, precipitation and water vapor pressure. Influenced by water vapor source, the values of d-excess are lower for the Westerly wind and the South Asia Monsoon on July and the Westerly wind and the East Asia Monsoon on August, but they are higher for the Westerly wind on other months, that they are also influenced by the weather conditions in rainfall process. The variation of stable isotope in precipitation exhibited significant temperature effect, and there is also some precipitation amount effect in spring and summer.

Keywords】Stable isotope; Precipitation; Water vapor source; Qilian Mountains